Perth Detectives are seeking witnesses to an assault that occurred in Murray Street Perth on Sunday 4 June 2017.
The 22 year old male victim was in company with a 20 year old woman when he was approached by a group of men near Pier Street.
The male victim was assaulted, before he fell to the ground and hit his head. He was knocked unconscious and received a fractured skull as a result of the incident.
His female friend was also assaulted.
The men pictured may be able to assist with the investigation.
Police have released a CCTV image of several men who they believe may be able to assist them with their investigation.
If you have any information about this offence make a report online at crimestopperswa.com.au or call Crime Stoppers on 1800 333 000, where all calls are strictly confidential, and rewards are offered. Please quote Reference Number 8598.